When I was a student I lived in university flats. Me and my flatmates had been in trouble with the warden for being noisy a few times, so we needed to keep him sweet. We lived on the first floor and he lived above. We were very friendly with the boys on the top floor, 2 floors above us.

So one day I ran up the 2 flights of stairs and straight into the boys' flat shouting at the top of my voice "HI YOU TOSSERS!!"

My mistake being that I had actually been on the ground floor and 2 floors up from there was the warden's flat....

I was out with a newish friend, and we both needed groceries, so we stopped. Wandered around the shop separately, then I spotted him, came up, looked in his basket, which was full of white bread and processed food, rather the vegetables, miso soup, and brown rice that I expected. I said 'God, you eat crap!'.

It wasn't him. He was wearing a green retro parka ironically, this old bloke was wearing it sincerely.

When I was a toddler I was eating a sandwich at a grown-up party, decided I didn't like it and went up to my mum's cousin, grabbed his hand and spat the soggy, half-chewed sandwich onto his palm. Luckily he has 2 DC of his own...

I have done similar by yelling at other small children in the supermarket.

The very worst though has to be when I went to Glastonbury age 17 with college friends and their extended group of friends.

We set up a big circle of tents with a fire in the middle, very nice. I then managed to get lost in the crown, made it back to our 'pitch' sat and drank wine, laughed, smoked etc and crashed out in my tent.

I was then very shocked to wake up next to a random girl who asked me whose friend I was. I was in a different field and had gatecrashed a party and slept in someone elses tent. Oh the shame.

My friend's been having trouble with the car lock being stiff in the cold weather. Out with a group of friends the other day, popped to supermarket to get some stuff. We went back to the car, friend puts the key in the lock, it won't turn. A minute or so later he starts getting quite cross with it, while we wait freezing our arses off not really looking at the car. Finally another friend looks down at where the back door handle should be, loud "ummmm"...cue us all looking down full into the faces of a family quietly eating pies and looking absolutely petrified. Worst thing was that all four of us ducked down to stare at them at the same time and instead of apologising or looking shocked, immediately fell about laughing in their faces.

Friend then insisted on driving past hooting and waving "to show them we've got the same colour car". Of course.

not long after my mum and dad moved house, i rang them up.my mum and i have this thing where we say "hello" in funny voices for ages before we start a conversation.anyway, so i'm doing this over the phone and i can sense she's getting agitated. then I get "is anyone there? can you hear me?" it wasn't my mum. i'd dialled the number incorrectly, so i was playing the game with some poor old dear.

Ds2 has football training 3 times a week, along with 4 of his freinds who stay very close to us. So all 4 of us mums take it in turns to do the runs.

Last wed was my turn to do the run home. Standing in sports hall trying to round up all 4 boys. One of them starts towards the door out, so I run after him and catch his hand and tell him 'x, I'm dropping you home tonight'. He looks confused, and the man standing him next to him says 'i'll take him'. I pull X behind me and turn on this man and say 'excuse me, I'm picking him up for his mother. He's coming with me'. Again he says 'It's ok- I'll take him'. I start getting stroppy and say 'who the hell do you think you are?'

Hushed silence from all the other parents. Ds chooses that moment to tell me in a loud stage whisper 'Mum, thats X's DAD'

I spent ages trying to open the door of a silver golf in a car park. A man came up and asked what I was doing trying to get into his car.Apologised profusely, while explaining that we had identical cars. I then opened the maroon polo parked alongside him and drove off.

He stood and glared at me in disbelief.What I hadn't explained to him was the silver golf was at home.

Well this isn't about people but a couple of years ago, I saw some clampers about to clamp my car in the flat car park. I shouted down that I had a resident ticket

Dh ran downstairs with he ticket but returned a couple of minutes later saying "They have clamped it" and grabbed some money to pay for the car to be released. He went down to pay

When I had dressed and gone down later, it became clear that the clampers had heard me and gone on to clamp another car. DH had arrived to see them clamping this other car , thought it was ours and had and paid them to release it.

Dh had paid £80 for SOMEONELSE'S CAR to be unclamped

In dh's defence our car at the time was a courtesy car so not our normal one but it was blue, the clamped car was red!!

One morning when I was about 16 or 17 I heard my mum in the hall about to leave the house. She'd said the evening before that she'd give me a lift into town, and I thought she was going early without me - I'd only just got up and I wasn't ready to go, still in pj's etc. So I ran down the corridor and sprang wildly into the hallway bellowing "WHERE ARE YOU RUNNING OFF TO?"

It wasn't my mum, of course, but a nurse who had come in to help my elderly grandmother, who lived with us get dressed - they always used to let themselves in and out quietly so as not to disturb the rest of the family.To make it worse, it was this particular nurse's first day, she jumped nervously when I leapt out on her, and started explaining herself.I was too shocked myself to attempt explanations, so just waved my hand and said, "fine, carry on, carry on"

We used to go Eurocamping when we were kids. Obviously there were rows and rows of identical tents. My sister and I once came back from a late night trip to the wash block, unzipped some poor Dutch family's tent and went to lie down with them in the dark. Oops.

We went to the wrong wedding reception. Ate their food, appeared in their wedding video... I think I've posted about it before. We just walked in saying "the bride's side" when asked who we were there for. We did wonder why we hadn't seen anyone we knew but it was a big wedding so it took a while to click.Then we drove 2 minutes down the road to the next venue.

Last night I was making tea when I heard DS wander into the kitchen. He'd been playing up all evening so I just yelled 'What have I told you tonight? DO NOT come into the kitchen while I am making tea! It is hot and it is dangerous. Go and sit down NOW'

Looked round to see the dog standing by her food bowl giving me a very confused look

Love this thread. I had similar bum tweaking experience when dd was 5 wks old. Had texted best mate to ask if ok to call as I was on mat leave and she busy at work. She replied saying yes sure am working from home call me there.. Anyway, called her home number and as soon as she said hi started wailing about being knackered, having sore boobs, how hard bm is etc until this voice said.. "are you crying"??. I had called the wrong number and let rip to some complete stranger.. I was mortified ! She went on to softly ask how old dd was, and tell me she had three dc's, one of which was also young and that bm was hard but would get better and having dc's is amazing and to try and enjoy it. Although i was so touched by her kindness I was just too embarrassed to speak and could only think of getting off the phone. My DH thought it was the funniest thing ever and told all his work colleugues. v v embarrassing. I often think of that woman now and wonder how she is getting on...